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IF10.2!南京大学附属医院“单细胞+转录组”斩获双一区Top!AZGP1低表达前列腺癌糖酵解转移新机制

  • 2026-07-05 03:04:04
IF10.2!南京大学附属医院“单细胞+转录组”斩获双一区Top!AZGP1低表达前列腺癌糖酵解转移新机制
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📃前列腺癌一旦发生转移,患者预后就急转直下,但咱们临床上到现在也没个靠谱的无创监测手段。那问题来了——能不能从公共数据库里挖出一个能预测转移、还能做液体活检的靠谱标志物?

📐南京大学附属医院团队在《Cellular & Molecular Biology Letters》上发表了一项研究,他们发现AZGP1这个基因一旦被启动子甲基化给“关掉”,肿瘤细胞就会疯狂启动糖酵解,从而加速转移。 而且他们还证明,检测这个基因的甲基化水平,完全有可能成为临床上动态监测前列腺癌转移的新工具

◎中文标题:甲基化诱导的AZGP1沉默通过刺激肿瘤糖酵解增强前列腺癌症转移

◎发表期刊:Cellular & Molecular Biology Letters

◎发表时间:2026年1月14日

◎影响因子:IF=10.2/Q1

研究背景

前列腺癌是男性第二大癌症,转移是主要死因。现有模型难以精准识别高危患者,且缺乏无创监测手段。肿瘤代谢重编程(尤其是糖酵解)被认为是促进转移的关键驱动力,但具体调控机制尚不清晰。

研究数据和方法

数据来源:单细胞用GSE141445,批量数据和甲基化用TCGA-PRAD,外加GSE21034等三个数据集做外部验证。

📖生信分析流程:Seurat处理单细胞,Scissor锁定转移亚群,多因素回归筛出AZGP1,再用scMetabolism和ssGSEA看糖酵解。

📢实验验证:Transwell、划痕、Western blot看转移,乳酸/ECAR/OCR测代谢,MSP查甲基化,再加动物转移模型。

研究结果解读

0

1

锁定转移核心基因

这帮人先用Scissor这个工具,把单细胞数据里的细胞分成两拨:一拨是“有转移潜力的”,另一拨是“没有的”【图1A】。

然后比了一下这两拨细胞里哪些基因表达不一样,筛出一堆候选【图1B】。再拿TCGA的数据一验证,发现AZGP1、CXCR4这6个基因在转移患者里确实有明显变化【图1C】。

有意思的是,AZGP1跟那些转移相关的通路(比如血管生成、细胞迁移)全是负相关,就是说AZGP1越高,这些转移能力就越弱【图1D】。

最后用多因素回归一跑,AZGP1被确认为一个独立的“保护因子”,整个预测模型的AUC做到了74%【图1E-F】(图1)。

图1:转移亚群鉴定与预测模型构建

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2

低表达预示差预后

看TCGA的数据,T3/T4期、有淋巴结转移、Gleason评分高的患者,AZGP1的表达量明显更低【图2A-C】。

他们把9个数据集放一起做了个荟萃分析,结论很一致:AZGP1低的患者,无病生存、无复发生存、无进展生存全都更差【图2D】。

动物实验也撑这个结论——让PC3细胞过表达AZGP1之后,打到小鼠尾巴里,肺转移的荧光信号明显弱了一大截【图2E】。

再看真实患者的病理切片,非转移的组织里AZGP1染色得分高得多,转移组织里基本没啥颜色【图2F-G】(图2)。

图2:AZGP1低表达促进前列腺癌进展并提示不良预后

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3

AZGP1掐断转移路

CCLE数据显示AZGP1在转移性细胞系中表达最低【图3A】,PCR验证了高低表达细胞系的差异【图3B】。

敲低AZGP1后Transwell迁移和侵袭能力都增强了【图3D】,过表达则相反【图3E】。划痕实验也证实过表达让细胞跑得慢【图3F-G】。

WB显示AZGP1低表达会上调N-cadherin、VEGFA、MMP7【图3H】(图3)。

图3:AZGP1调控前列腺癌细胞增殖与迁移

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4

丢AZGP1糖酵解嗨

单细胞代谢分析显示低AZGP1的肿瘤细胞糖酵解通路更活跃【图4A】。

AZGP1跟糖酵解评分和LDHA等6个酶都呈负相关【图4B-D】。过表达AZGP1后乳酸和ECAR都降了,OCR升了【图4E-G】。

敲低AZGP1则完全相反,乳酸ECAR飙升,OCR掉下来【图4H-J】(图4)。

图4:AZGP1表达下调可激活糖酵解通路

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5

甲基化关掉AZGP1

启动子区的cg26429636位点甲基化越高,AZGP1表达越低【图5A】。有淋巴结转移的患者这个位点甲基化水平更高【图5B】。

AZGP1跟DNMT1、DNMT3A、DNMT3B都负相关【图5D-F】,甲基化位点跟DNMT1、DNMT3A正相关【图5G-L】。

甲基化特异性PCR证实,高表达细胞系是未甲基化,低表达细胞系是部分甲基化【图5M】(图5)。

图5:启动子区差异性甲基化调控前列腺癌转移中AZGP1的表达

文章小结

这篇文献把一个“降表达”的基因AZGP1给讲透了:甲基化把它关掉→糖酵解被激活→肿瘤细胞跑得更快。最值得学的不是结论,而是那条“单细胞→批量→甲基化→湿实验”的黄金分析链,拿过来就能套到你自己关注的癌种和基因上。

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  1. CONNECT:[ UseTime:0.001025s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001552s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008723s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.007848s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001553s ]
  6. SELECT * FROM `set` [ RunTime:0.000653s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001706s ]
  8. SELECT * FROM `article` WHERE `id` = 581685 LIMIT 1 [ RunTime:0.013604s ]
  9. UPDATE `article` SET `lasttime` = 1783313131 WHERE `id` = 581685 [ RunTime:0.011868s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000766s ]
  11. SELECT * FROM `article` WHERE `id` < 581685 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001113s ]
  12. SELECT * FROM `article` WHERE `id` > 581685 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004467s ]
  13. SELECT * FROM `article` WHERE `id` < 581685 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.041956s ]
  14. SELECT * FROM `article` WHERE `id` < 581685 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.024980s ]
  15. SELECT * FROM `article` WHERE `id` < 581685 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.026013s ]
0.330222s